Lucia is the daughter of Kianu, who was murdered by Gorudo and Alec Wisemail, causing Lucia to become chief of the Karaya Clan. She joins forces with Jowy Atreides by the promise that the Karayans will be given land. She also wishes to fulfill her revenge against those who murdered her father.

She is a fierce warrior and once tried to assassinate Riou after sneaking into the Headquarters. She protects Jowy until the end, but retreats after being defeated at L'Renouille. Later on, after Teresa Wisemail makes her father's crimes public, Lucia forgave Greenhill for her father's death.

Soon after the Dunan Unification War concluded, her son Hugo was born to her and an unnamed father. In the Second Fire Bringer War, she assisted the Lizard Clan in fighting against Zexen, and joined the Fire Bringer. Afterwards, she resigned as chief, giving the title to her son Hugo, and traveled to Dunan to work for the Karaya Clan's future there. - Blue Moon, KoRnholio